A phallus-shaped, green, and rather unhappy monster in Markus Persson's most popular game, Minecraft. They are renowned for sneaking up on players and exploding, killing the player and sometimes destroying something a player has built. They are hard to notice until it's too late, since Creepers don't make any sound when they're walking. When they fet close to a player, however, they hiss and explode. Like other monsters in the game, they can't spawn unless it's in a dark enough area, like in a cave, or at night. Many players will rage-quit after being killed by one and will not play Minecraft again for weeks on end.

Player is killed by a Creeper.
"Fuck! I didn't even hear the thing! Screw this game!"